Ruby on Rails的：如何验证没有Active录制模式？ [英] Ruby on Rails: How to validate a model without Active Record?

问题描述

目前，我正在试图验证域，而无需一个的ActiveRecord :: Base的继承。

I'm currently trying to validate fields without having an ActiveRecord::Base inheritance.

我的模型存储的缓存服务器上的数据，所以我不需要ActiveRecord的。

My model stores the data on a cache server so I do not need ActiveRecord.

不过，我想验证模型的领域，如我想如果我使用的ActiveRecord（如 validates_numericality_of：数量：greater_than =＆GT; 0 ）？

Anyway, I would like to validate the fields of the model like I would if I was using ActiveRecord (e.g validates_numericality_of :quantity, :greater_than => 0) ?

我怎么能这样做？

非常感谢你的帮助。

推荐答案

在Rails 3，活动模型包含活动记录的非数据库的功能。

In Rails 3, Active Model contains the non-database functionality of Active Record.

基本上，你需要包括加载ActiveModel ::验证，定义字段 attr_accessor ​​，使用初始化方法来初始化属性，使他们非持久化模型不保存到数据库中。

Basically, you need to include ActiveModel::Validations, define your fields as attr_accessor, use an initialize method to initialize the attributes and make them non-persisted as your model isn’t persisted to a database.

这样你就可以对无表格模型验证和控制器一样的，如果你使用活动记录。还有一个Railscast这个<一href="http://railscasts.com/episodes/219-active-model">http://railscasts.com/episodes/219-active-model.

This way you can have validations on the tableless model and your controller the same as if you were using Active Record. There's also a Railscast on this http://railscasts.com/episodes/219-active-model.

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